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June 10, 2021
The constant temperature and humidity test chambers are classified according to their types. There are mainly two classifications, namely, the refrigeration method in the test chamber and the control operation of the test chamber.
1. Classification of control operations:
The constant temperature and humidity test chamber can be touched and programmed, with 1000 sections of programs, a capacity of 999 steps per section, a maximum setting of 99 hours and 59 minutes per period, 10 groups of program link functions, and can store historical data within 600 days ( In the 24-hour running state, the recording interval is more than 1min, and the temperature and humidity data are recorded at the same time), and the uploaded historical data curve in the control can be replayed.
The constant temperature and humidity test box is a single-point button, enter the temperature, humidity and constant time. After reaching the temperature and humidity point, it will start to be constant, and the constant time will automatically stop when it is reached.
2. Classification of refrigeration methods:
The water-cooled chiller of the constant temperature and humidity test box must be equipped with a cooling tower. For an open cooling circulating water system, the cooling water absorbs heat and contacts the air. CO2 escapes into the air, and the dissolved oxygen and turbidity in the water increase. ※Four major problems caused by the cooling circulating water system: corrosion, scaling, growth of bacteria and algae and sludge. If the water quality is not treated, it will seriously damage the refrigeration equipment, greatly reduce the heat exchange efficiency, and cause a waste of energy.
The constant temperature and humidity test chamber air-cooled type, also known as air-cooled, mainly eliminates the cooling tower, cooling water pump and piping system that are essential for the cooling water system, and avoids the scale of the cooler and the pipe system in areas with poor water quality. It also saves water resources. It is the most economical and simple model for maintenance among the current constant temperature and humidity test chamber products.